| 21. | The mass of a star can be directly determined only from its gravitational attraction.
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| 22. | The relative masses isn't what's important, but rather the gravitational attraction of the bodies.
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| 23. | However the bulges can be slightly misaligned with respect to the direction of gravitational attraction.
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| 24. | In some of the variations the ships fight near a planet which has gravitational attraction.
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| 25. | Isaac Newton later gave a theoretical explanation based on laws of gravitational attraction and dynamics.
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| 26. | A "'satellite galaxy "'is a galaxy that orbits a larger galaxy due to gravitational attraction.
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| 27. | So, they defined two independent circular orbits, not taking gravitational attraction into account at all.
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| 28. | The gravitational attraction of Earth's mass prevents other non-thermal loss processes from appreciably depleting the atmosphere.
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| 29. | When observed visually, clusters appear to be collections of galaxies held together by mutual gravitational attraction.
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| 30. | Another person's telescope magnified the Beehive Cluster, a group of stars held together by gravitational attraction.
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